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QSN-8895-1: Sudo vulnerability
October 7, 2026
Summary
Sudo could allow a local user to bypass time-based access restrictions.
Details
It was discovered that Sudo did not properly handle time-based access restrictions when sudoers rules used NOTBEFORE or NOTAFTER with timestamps omitting the trailing timezone indicator. A local attacker could possibly use this issue to execute commands outside the intended time window by manipulating the TZ environment variable.
Affected QuantaStor releases
| Release | Platform | Package | Exposure | Shipped version | Fixed version | Status |
|---|---|---|---|---|---|---|
| 6.9.1.001 | Ubuntu 22.04 LTS | sudo | Internally-facing | 1.9.9-1ubuntu2.4 | 1.9.9-1ubuntu2.7 | Fixed by QuantaStor security update |
| 6.9.0.464 | Ubuntu 22.04 LTS | sudo | Internally-facing | 1.9.9-1ubuntu2.4 | 1.9.9-1ubuntu2.7 | Fixed by QuantaStor security update |
| 6.8.6.015 | Ubuntu 22.04 LTS | sudo | Internally-facing | 1.9.9-1ubuntu2.4 | 1.9.9-1ubuntu2.7 | Fixed by QuantaStor security update |
| 6.8.5.018 | Ubuntu 22.04 LTS | sudo | Internally-facing | 1.9.9-1ubuntu2.4 | 1.9.9-1ubuntu2.7 | Fixed by QuantaStor security update |
| 6.8.4.038 | Ubuntu 22.04 LTS | sudo | Internally-facing | 1.9.9-1ubuntu2.4 | 1.9.9-1ubuntu2.7 | Fixed by QuantaStor security update |
| 6.8.3.018 | Ubuntu 22.04 LTS | sudo | Internally-facing | 1.9.9-1ubuntu2.4 | 1.9.9-1ubuntu2.7 | Fixed by QuantaStor security update |
| 6.8.2.002 | Ubuntu 22.04 LTS | sudo | Internally-facing | 1.9.9-1ubuntu2.4 | 1.9.9-1ubuntu2.7 | Fixed by QuantaStor security update |
| 6.8.1.007 | Ubuntu 22.04 LTS | sudo | Internally-facing | 1.9.9-1ubuntu2.4 | 1.9.9-1ubuntu2.7 | Fixed by QuantaStor security update |
| 6.8.0.205 | Ubuntu 22.04 LTS | sudo | Internally-facing | 1.9.9-1ubuntu2.4 | 1.9.9-1ubuntu2.7 | Fixed by QuantaStor security update |
Internally-facing: only accessible when logged into the QuantaStor console/ssh as the qadmin administrative sudo user; generally lower priority. Externally-facing: part of a service the storage platform presents on the network (or the kernel), so potentially reachable over the network.
CVEs
References
https://ubuntu.com/security/notices/USN-8895-1
https://nvd.nist.gov/vuln/detail/CVE-2026-96512
Update
Fixes marked Fixed by QuantaStor security update are applied by upgrading QuantaStor with security patches included (Upgrade Manager). Fixed package versions:
| Platform | Package | Version |
|---|---|---|
| Ubuntu 22.04 LTS | sudo | 1.9.9-1ubuntu2.7 |
| Ubuntu 24.04 LTS | sudo | 1.9.15p5-3ubuntu5.24.04.4 |
| resolute | sudo | 1.9.17p2-1ubuntu3.2 |